/*
 * Copyright (c) 2010, Thiago Campos Viana.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Thiago Campos Viana nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package lib;

/**
 * php md5 compatible function
 * @author Thiago Campos Viana
 */
import java.security.MessageDigest;

public class Md5 {

  /**
   * @param value
   * @return
   */
  public static String encodeMd5(String value) {
    StringBuffer encoded = new StringBuffer();
    if (value != null) {
      try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.update(value.getBytes());
        byte[] digest = md5.digest();
        for (int i = 0; i < digest.length; ++i) {
          int b = (int) digest[i] & 0xFF;
          if (b < 16)
            encoded.append("0");
          encoded.append(Integer.toHexString(b));
        }
      } catch (Exception e) {
        // ignore exceptions
      }
    }
    return encoded.toString();
  }
}